The maximum heart rate, in beats per minute, that you should achieve during exercise is 220 minus your age, [tex]220 - a[/tex]. Your exercise goal is to improve cardiovascular conditioning. Use the following formulas to answer parts (a) and (b).
Lower limit of range:
[tex]\[ H = \frac{7}{10}(220 - a) \][/tex]
[tex]\[ H = \frac{4}{5}(220 - a) \][/tex]
a. What is the lower limit of the heart rate range, in beats per minute, for a 25-year-old with this exercise goal?
The lower limit of the heart rate range is [tex]\boxed{\text{ }}[/tex] beats per minute.
(Round to the nearest integer as needed.)
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Note: The second formula appears to be another way to express the heart rate limits, so please double-check which one to use as per the exercise requirements.